Paper carton



April 20, 1943.

A. s. ETHRIDGE PAPER CARTON Filed March 1'7, 1941 2 Sheets-Sheet l IHVEH'EEJI FLiEthr-idg:

Fit- 3131 11555 April 20, 1943. A. s. ETHRIDGE PAPER CARTON Filed March 17, 1941 2 Sheets-Sheet 2 Invent-.01" FL'iE thr'i'dgE Patented Apr. 20, 1943 PAPER CARTON Albert S. Ethridge, Milwaukee, Wis., assignor to Hummel & Downing Company, Milwaukee,

Wis.

Application March 17, 1941, Serial No. 383,751

1 Claim.

This invention relates to cartons formed of paper or composition board, and consisting of a box or container slidably positioned within an outer casing, having open ends to allow insertion or removal of the box.

The primary object of the present invention resides in the provision of a carton of the foregoing type, in which means are provided on the top of the outer casing for engaging the end walls of the container to prevent relative longitudinal movement of the two when assembled.

Incidental to the foregoing, a more specific object of the invention is to provide the top of the outer casing with yieldable end flaps upon which depending tongues are formed for insertion into the container to engage the inner faces of its end walls and lock the container against undesired, longitudinal shifting or displacement.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the novel construction, combination and arrangement of parts, substantially as hereinafter described, and more particularly defined by the appended claim, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claim.

In the accompanying drawings is illustrated one complete example of the physical embodiment of the present invention constructed according to the best mode so far devised for the practical application of the principles thereof.

In the drawings:

Figure 1 is a perspective view of a carton constructed in accordance with the preferred form of the present invention;

Figure 2 is a fragmentary, perspective view showing one of the locking flaps and tongues in raised position;

Figure 3 is a similar view showing the container partially projected from the outer casing;

Figure 4 is a side elevational view, with parts broken away and in section to more clearly illustrate structural details;

Figure 5 is a transverse, sectional view, taken on the line 5-5 of Figure 4;

Figure 6 is a plan view of the blank from which the outer casing is formed;

Figure 7 is a fragmentary, perspective view of a modified form of the invention;

Figure 8 is a similar view of the container partially projected from the outer casing;

Figure 9 is a side elevation with parts broken away and in section;

Figure 10 is a transverse section, taken on the line Ill-4|] of Figure 9;

Figure 11 is a plan view of the blank from which the modified outer casing is formed.

In the preferred form of the invention illustrated in Figures 1 to 6, inclusive, the numeral I designates a rectangular open top box or container of paper or composition board, and formed in any conventional manner, inasmuch as the construction of the box comprises no part of the present invention.

Surrounding the container I is an outer casing 2 having open ends and also formed of paper or composition board in any desired manner, it being understood that the material employed is to be of a yieldable character.

The ends of the top 3 of the outer casing are provided with longitudinal slits 4 spaced inwardly from the side edges of the top 3 to provide yieldable end flaps 5, having depending tongues 6 formed on their ends by scoring or folding.

In assembling the carton, the container is inserted into either end of the outer casing 2 as shown in Figure 3, the flap 5 at the entrance end being raised to permit initial insertion, and after the container is assembled to its closed position within the casing, the flaps 5 are returned to their normal positions, with the depending tongues 6 engaging the inner faces of the ends 1 of the container. Obviously, the tongues 6 then serve to prevent longitudinal shifting of the container within the outer casing.

While cartons of the present type may be used for the packaging of practically all kinds of articles and commodities, in some instances, particularly in the packaging of processed bricks of cheese, the containers are provided with box collars or inserts 8, which further serve to reinforce the container.

As best shown in Figures 7 to 11, inclusive, in the event that the invention is employed in connection with a container having a liner, the depending tongues 6 carried by the flaps 5 of the outer casing are inserted between the ends of the container and ends of the liner. This may be accomplished by either springing the ends of the container outwardly, or normally providing a space between the ends of the liner and container.

Also in the modification shown in Figures '7 to 11, the flaps 5' may be formed by slitting the outer casing 2 along the fold lines 9 between the top of the casing and its side walls, and while such structure provides greater yieldability of the flaps 5', in instances where the carton is subjected to rough usage, the outer shell becomes unduly weakened. Therefore, in such use, the preferred form of the invention is desirable.

From the foregoing explanation considered in connection with the accompanying drawings, it will be seen that effective means has been provided at no additional expense, and easily manipulatable for securely locking a box or container within an outer casing against longitudinal shifting, thus making this type of carton particularly desirable because of the reinforcement afforded by the outer shell, and the fact that projection or shifting of the container within the outer shell has been eliminated.

I claim:

In a carton embodying an open top box and atelescopic casing therefor of the same length as the box; a locking means for the box and casing comprising tongues extending beyond the ends of one wall of the casing, the end of said casing being longitudinally slit a predetermined distance upon opposite sides of the tongues forming tabs in conjunction therewith, said tongues being folded downwardly and engaging the inner end walls of the box, whereby the same is held against sliding movement with relation to said box.

' ALBERT S. ETHRIDGE. 

